Hiram Stone Phillips, 67, a former adviser on Latin American affairs for the Agency for International Development and a senior associate with Development Associates Inc., management and governmental consultants in Columbia, died at a hospital near St. Petersburg, Fla., after a heart attack. He was on vacation at the time.

Mr. Phillips was director of AID's office of regional projects for Latin America when he retired in 1969. He previously had been deputy director in the office of institutional development for the agency's Latin America bureau.

In 1952, while working for the Department of State as a public administration advisor to the government of Costa Rica, Mr. Phillips helped that country establish a civil service system as part of President Truman's Point Four technical assistance program.

He also served on the planning staff of the advisory group that initially developed the administrative structure for the United Nations.

Mr. Phillips began his government career in 1935 and had worked for the old Work Projects Administration (WPA) before joining the State Department.

He was born in Corning, N.Y., and earned a degree in public administration from Cornell University. He also attended the University of Wisconsin and American University and was on the faculty of the Department of Agriculture's Graduate School.

In 1966 and 1967, Mr. Phillips was a federal executive fellow at the Brookings Institution. His book "Guide for Development: Institution -- Building and Reform" was published in 1969.

He was a member of the American Society for Publix Administration, the International Personnel Management Association and the Society for International Development.

He lived in Chevy Chase, Md., and was a 33rd degree Mason and member of the Mithras Lodge of Perfection of Washington. He also was a member of the International Club and the Washington Hebrew Congregation.

Survivors include his wife, the former Ruth Kusner, of the home; two sons, Dr. Lawrence Phillips, of Evanston, Ill., and Richard Phillips. of Berkeley Heights, N.J.; a sister, Ruth M. Phillips, of New Rochelle, N.Y., and four grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the American Heart Association or to the Library Fund of the Washington Hebrew Congregation.